GeForce GTX 660 Ti vs GeForce GTX 980 Ti

Intro

Compare all of that to the GeForce GTX 980 Ti, which makes use of a 28 nm design. nVidia has clocked the core speed at 1000 MHz. The GDDR5 memory works at a frequency of 1750 MHz on this particular model. It features 2816 SPUs along with 176 TAUs and 96 Rasterization Operator Units.

Display Graphs

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

GeForce GTX 980 Ti		17120 points
GeForce GTX 660 Ti		6013 points
	Difference: 11107 (185%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 660 Ti		150 Watts
GeForce GTX 980 Ti		250 Watts
	Difference: 100 Watts (67%)

Memory Bandwidth

Theoretically, the GeForce GTX 980 Ti should be a lot faster than the GeForce GTX 660 Ti in general. (explain)

GeForce GTX 980 Ti		336000 MB/sec
GeForce GTX 660 Ti		144000 MB/sec
	Difference: 192000 (133%)

Texel Rate

The GeForce GTX 980 Ti is much (more or less 72%) better at AF than the GeForce GTX 660 Ti. (explain)

GeForce GTX 980 Ti		176000 Mtexels/sec
GeForce GTX 660 Ti		102480 Mtexels/sec
	Difference: 73520 (72%)

Pixel Rate

The GeForce GTX 980 Ti should be much (approximately 337%) more effective at anti-aliasing than the GeForce GTX 660 Ti, and should be able to handle higher screen resolutions without losing too much performance. (explain)

GeForce GTX 980 Ti		96000 Mpixels/sec
GeForce GTX 660 Ti		21960 Mpixels/sec
	Difference: 74040 (337%)

Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.

Price Comparison

Specifications

Memory Bandwidth: Bandwidth is the maximum amount of data (in units of MB per second) that can be moved over the external memory interface in a second. It is worked out by multiplying the interface width by its memory speed. If the card has DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed per second. This is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly record to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.